<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>双飞翼布局</title>
</head>
<body>
  <div class="clearfix">
    <div class="container">
      <div class="center"></div>
    </div>
    <div class="left"></div>
    <div class="right"></div>
  </div>
</body>
<style>

  .container {
    width: 100%;
  }

  .container, .left, .right {
    float: left;
  }

  .left, .right {
    width: 200px;
    height: 300px;
  }

  .left {
    margin-left: -100%;
    background-color: yellow;
  }

  .center {
    margin: 0 200px;
    background-color: red;
    height: 400px;
  }

  .right {
    margin-left: -200px;
    background-color: blue;
  }
</style>
</html>